APA (7th ed.) Citation

Kaufman, L., & Rousseeuw, P. J. (1990). Finding groups in data: An introduction to cluster analysis. Wiley.

Chicago Style (17th ed.) Citation

Kaufman, Leonard, and Peter J. Rousseeuw. Finding Groups in Data: An Introduction to Cluster Analysis. New York: Wiley, 1990.

MLA (9th ed.) Citation

Kaufman, Leonard, and Peter J. Rousseeuw. Finding Groups in Data: An Introduction to Cluster Analysis. Wiley, 1990.